I have a Nissan Sentra 2010. One day my car started up and ran just fine taking my wife to work in the morning. When I went to pick her up the car would just crank and wouldn't start. It's not getting any spark or gas. The gas pump does work. Thought it might of been the crank shaft sensor so that's been replaced. I tried hooking a diagnostic tool to see if I would get any codes, but I'm only getting connection errors. I fear the computer has gone bad.